Method of making partially lined bearings



' Oct. 27, 1931. J. BRINCIL METHOD OF. MAKING PARTIALLY LINED BEARINGSOrigihal Filed March 2a. 1922 -Patented 0&(21, 1931 UNITED STATESPATENT: OFFICE JOSEPH BRINCIL, OF READING, PENNSYLVANIA.

METHOD OF MAKING PAR'ITALLY LINE) BEARINGS Original application filedMarch 26, 1928,8ei-1a1 No. 264,666. Divided and this applieatiim filedJanuary 21, 1929. Serial no. 883,878.

. This invention relatesto bearings of the lined type and method ofmakingT them and isa division of application Serial 0. 264,666, filedMarch 26, 1928, for partially lined bearm i v Til the past eiforts havebeen made to reduce the cost of'bearings by uniting the costly bearingmetals onto a cheaper metal such as steel.

Steel shapes or steel strips were tinned and lined with moltenbearingmetals suchas babbitt, either by the die-casting method or bycentrifugal action; These bearings then consisted of a steel basefullylined with a thin layer of costly Babbitt metal. These methodssubstantially reduced the cost of bearings.

Another type of bearing consists of a tinned strip of steel in circularform fully lined with a strip of bronze metal. As an 7 example of thereduction of cost of these methods it will be apparent that if a stripof steel one thirty-second of an inch thick, has a bearing lining ofstrip bronze one thirtysecond of an inch thick united thereto, the

average, cost of the combined metals is substill further reduce the costof lined bearings and at the same time retain the good bearing bearingswhen being replaced stantia'lly lowered over a strip of sheet bronzeone-sixteenth of an inchthick. This latter method efi'ects a reductionof approximately thirty-three per cent in the material cost.

The object of the present invention. is to.

I qualities of the bronze 'or Babbitt metals. It has been noticed thatmost all worn surface in the direction-of the load thrust,

and the side opposite the thrust-shows practically no wear.

As most. bearings must befitted with one and one-half to two-thousandthsof an inch of clearance so as to insure the bearing and shaft fromseizure, it will be .ap arent that this clearance space between sha andhear:

ing willtake place opposite the load thrust.

show the worn This clearance space also acts as a small v reservoirforoil.

From this it will be apparent that the half of the bearing. opposite theload'thrust will not have fullcontact of the shaft, such as the half ofthe bearing in direction of the load thrust.

With this point in view, I have proceeded to line only that part of thebearing which is necessary, thereby reducing the amount of exin metalthat is to be used.

proceed to do this by taking a piece of strip steel to be used as a basemetal, and

forms a longitudinal recess or depression in running it between tworolls, one roll of which the center of the strip. The width of thisrecess is equal to about one-half the width of the strip, and the depthof the recess is and tinned.

A strip of bronze bearing metal is cut to a width corresponding tothewidth of the recess in thebase metal. This bronze strip is also cleanedof all dirt and grease and one H surface is fluxed and tinned.

The tinned bronze bearing strip is placed in the recess of the basemetal, and by means of heat and pressure is united to the base metal.

If a bearing with an oil groove is desired, the bronze strip isperforated with a diagonal opening spaced along the bronze'strip ing.

The combined strip is then trimmed to the I exact width necessary," andthen parts are sheared transversely along the'strip'. v

The sheared parts are then formed into bearings, with the bearing metalforming a according to-the length of the finished bearpensive caringmetal, and at the same time 5 retaining the good qualities of whateverbearsame thickness.

' In the accompanying drawings, Figure 1 is a plan View of a strip ofsteel or base metal with a longitudinal recess, and a strip ofbearing-metal united to the recess.

Figure-2 is aplan view of a strip of recessed base metal with aperforated strip of bearing metal united thereto.

Figure 3 is a sectional View along 33 in Figure 1. t

Figure 4 is asectional view along 4-4 in Figure 2.

Figure 5 is a perspective view of a part cut off from strip in Figure 1.

Figure 6 is a perspective view of a part out off from strip in Figure 2.

Figure 7 is a perspective view of a finished bearing.

Figure8 is an end view of a finished bear- I ing with a sectional viewof a shaft contained therein.

Referring to Figure 1, the numeral 10 represents a strip of base metalpreferably steel because of being the least expensive, and 11 shows alongitudinal recess or depression below the general surface of themetal, with the bearing metal strip 12 united to the recess by solder.

I form the recess 11 in strip 10 by running the steel strip between twohardened steel 36 rolls, the top roll having a width equal to the widthof the recess, while the bottom roll is sufliciently long enough toextend out beyond the width of the steel strip.

- The recess is then cleaned properly to remove all grease and dirt andis then tinned by fluxing only the recess, and running the fluxed stripthru a bath of molten tin. Any

- suitable flux may be used such as rosin or any of the solderingacids.

A bearingstrip of bronze is then. sheared to a width equal to the widthof the recess and is also tinned on one surface by fluxing pillile sideand running it thru a bath of molten The tinned strip of bronze is thenunited to the tinned strip of base metal by applying the two tinnedsurfaces together and movlng the two strips over any suitable means ofheatlng and then compressing the strips between rolls and allowing themto cool off.'

If a bearing with an oil groove is desired a strip of bronze isperforated as is shown by 13 in Figure 2'. and the same procedure sfollowed as in the plain bronze strip. The perforations 14 to be used asoil grooves 1n bearing strip 13 are pierced in a punch press, and arespaced so thatwhen each part is out off, it will contain one perforation14 extending diagonally across the bearing strip to serve as a reservoirfor oil. as is shown in Figure 6.-

The combined strip in Figure 1 is then fed thru a suitable punch presswhere parts are cut off as is shown in Figure 5.

The parts are cut off across the width of the strip; the widthconstituting the circumference of the bearing to be formed, and thelength of the parts comprise the length of the bearing.

' Figure 6 shows a part out off from the combined strips in Figure 2,and contains a perforated section of bearing element 13, having aperforation 14 to be used as an oil groove.

The parts are then formed in cylindrical form as is shown in Figure 7where the ends 15 of bearing element 12 are shown abutting against therecessed walls of the base metal, thus insuringagainst any movement ofthe bearing element 12 when the shaft is in motion.

In Figu partially lined bearing with a section of a shaft 16 assembledtherein. The clearance 17 between shaft 16 and the partially linedbearing is shown in exaggeration, when the load thrust is down on thelined part of the bearing.

While I have shown the preferred form of embodiment of my invention, itwill be underformed into cylindrical form, orsteel tubing re 8 is shownan end view of the may alsobe used; the recess being formed at the timethe tube is extruded.

I claim:

1. The method of making a partially lined bearing which comprisesforming a recess in a strip of base metal, then tinning the recessedsurface, then uniting to the tinned recess surface abearing metal bymeans of heat" and pressure, then cutting the combined base and bearingmetal strip into parts of the required lengths. and forming the saidparts into cylindrical form.

2. The method of making a partially lined bearing which comprisesforming a longitudinal recess in a strip of base metal, then tinning therecessed surface, then uniting to the tinned recessed surface, a tinnedstrip of bearing metal, then cutting the combined base and bearing metalstrip into. parts, and

- forming said parts into cylindrical form.

. '3. The method of making a partially lined I bearing which comprisesforming a; recess in a strip of base metal, then tinning the recessedsurface, applying to the tinned recessed surface a perforated strip ofbearing-H metal, one surface of which is tinned, then uniting the tinnedsurface of the base metal to the tinned surface of the perforatedbearing metal by means of heat and pressure,

then cutting the combined base and bearing metal strip into parts eachcontaining a perforated section, and forming the said parts intocylindrical form.

4; The method of making a partially lined hearing which eom firisesforming a longitudinal recess centre y located in a stri of base metal,then tinnmg the recessed an ace,

5 then uniting to the tinned recessed surface a.

' tinned strip of bearing metal, by means of I heat and pressure; thencutting the combined base and bearing metal strip mto parts and formingthe said parts into cylindncal km,

with the bearing lining innermost and centrally located.

In testimony whereof I aflix mly si ature.v

JOSEPH BR GIL;

